Homework Statement
Here is the problems exactly as written in the homework:
A Ferrari accelerates from 0 to 100km/hr in 4.80 secs. What force (in Newtons) does a passenger with a mass of 68kg experience during the acceleration?
Homework Equations
a = v/t
F=ma
The Attempt at a...
Ok. I'm done with this one. Used up all attempts that the homework program allows for. It came back with a correct answer of 60m/s. Clearly there was something that I missed here. Would anyone be willing to clarify for me how this answer works out?
Thanks. And sorry if I seemed frustrated...
KE = 1/2mv^2
what velocity am I using? Assuming that my above calculations are wrong, then the only velocity left to work with is the final velocity, which is 0. The plane can't have 0 KE at landing.
Alright. Here's what I've come up with.
Starting off by calculating the spring potential:
U = .5kx^2 = .50(60000)(30)^2 = 27000000 J
Since U = work, than this is the amount of force being applied to the spring by the plane.
So to convert force to speed, I tried:
F = ma
27000000...
Homework Statement
As a 15000 kg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 60000 N/m. If the spring stretches 30 m to stop the plane, what was the plane's landing speed?
Homework Equations...
Yep; really need to go back and review this concept then. It never even occurred to me to approach the problem in that matter.
Would you have any suggestions for online resources where I can review physics concepts in general? The textbook we're using in class isn't a very good explanation...
Yeah. I noticed that after I posted it and went back and reworked it. Answers I'm coming up with are still wrong though. I used up all the allotted attempts at the problem that homework program allows and as such it displayed the correct answer for me. It was 1.73 m/s. Don't have any clue how...
Here is the best thing I've come up with in regards to finding the post collision speed of the first ball.
Assuming the masses are identical, I call the masses for both balls simply "M". This is an isolated system so initial momentum = final system momentum.
initial p for ball one =...
Ok. But I'm still unclear on what this problem expects.
I thought it might be an impulse problem; whereas the change in momentum of one ball would be equal in magnitude and opposite in direction to the momentum change in the other ball, which would make the angle on the first ball 90 degrees...
I assume it to mean that the masses are identical; however since no other information is given, I can't be for certain. How I have it worded above is the exact wording from the homework problem.
Homework Statement
This is a homework that has me completely stumped. If anyone help me out here, I would greatly appreicate it.
A billard ball is east at 2.0 m/s. A second, idential ball is shot west at 1.0 m/s. The balls have a glancing collision (not head-on), deflecting the second ball...